SPEECH DETECTION APPARATUS WITH INFLUENCE OF INPUT LEVEL AND NOISE REDUCED

摘要

A speech detection apparatus capable of reliably detecting speech segments in audio signals regardless of the levels of the input audio signals and the background noises. In the apparatus, a parameter of input audio signals is calculated frame by frame, and then compared with a threshold in order to judge each input frame as one of a speech segment and a noise segment, while the parameters of the input frames which are judged as the noise segments are stored in the buffer and the threshold is updated according to the parameters stored in the buffer. The apparatus may utilize a transformed parameter obtained from the parameter, in which a difference between speech and noise is emphasized, and noise standard patterns constructed from the parameters of the input frames preestimated as noise segments.